Não informado. (1927). Proceedings and addresses of the American Philosophical Association. American Philosophical Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Proceedings and Addresses of the American Philosophical Association. Newark, Del: American Philosophical Association, 1927.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Proceedings and Addresses of the American Philosophical Association. American Philosophical Association, 1927.
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